The main character is the umbrella man, of course. And there is also the person he tries to sell his umbrella to.
In the 'the umbrella man story', the central character is the man with the umbrella. He drives the story forward with his actions of trying to sell the umbrella. The other important character is the one whom he approaches to sell it. This second character is crucial as their reaction and interaction with the umbrella man shape the story.
Obviously, the main character is the man with the umbrella.
As I don't know the exact 'umbrella short story', it's hard to say. It could be a lonely traveler who uses the umbrella to protect from the elements.
The main characters are the umbrella man, a mother and her daughter.
The main character is likely a girl who is at an age where she is starting to be aware of social differences. There might also be her mother and perhaps some other minor characters like the people who own or are associated with the white umbrella. The girl's perspective is central, and through her eyes, we see how she views the white umbrella and the people around it.
I'm not sure specifically as I haven't read the exact story, but usually in such a story, there would be a character who owns the blue umbrella. There might also be other characters who interact with the owner because of the umbrella, like neighbors or strangers on the street.
I'm not sure as I haven't read the story, but it could be the person who owns the blue umbrella. Maybe there's also a character who tries to steal the umbrella or someone who helps the owner protect it.
I don't know as there is not enough information given about this story. It could be a farmer, or a group of farmers, or perhaps a child if the 'third grade' refers to a school grade.
Without more details about the 'world's end umbrella story', it's difficult to determine the main characters. However, it's likely that there is a protagonist who is either in possession of the umbrella or is on a quest to find it. There could also be an antagonist or a series of antagonists who oppose the protagonist's goals regarding the umbrella. Maybe there are side characters too, such as friends or family members of the protagonist who get involved in the story because of their relationship with the main character and the importance of the umbrella in the world - ending situation.
In Roald Dahl's 'The Umbrella Man', the key characters are the mother, a rather ordinary woman who is out with her daughter. The daughter is with her mother, experiencing this strange encounter. And of course, the umbrella man. He is an old, rather sly character. He uses his umbrella as a tool in his little con game. He tries to deceive the mother and daughter and is ultimately the focus of the strange events that unfold in the story.
In the big umbrella story, there might be the owner of the umbrella as a main character. If it's a story about a family heirloom, there could be different family members involved like a mother who passes it down to her daughter. There may also be people the character with the umbrella meets during their adventures with it, like a kind stranger who helps when the umbrella gets damaged.